Astrology is a system of divination founded on the notion that the relative positions of celestial bodies are signs of or-more controversially among astrologers-causes of destiny, personality, human affairs, and natural events. The primary astrological bodies are the sun, moon, and planets; although astrology is commonly characterized as "reading the stars", the stars actually play a minor role. The main focus is on the placement of the seven planets relative to each other and to the signs of the zodiac, though the system does allow reference to fixed stars, asteroids, comets, and various mathematical points of interest as well. As a craft, astrology is a combination of basic astronomy, numerology, and mysticism. In its modern form, it is a classic example of pseudoscience.